std::bind vs lambda

Compared with std::bind, lambda is not just more elegant, but also has better performance.

struct A
{
 void test() const { std::cout << "test" << std::endl; }
 ~A() { std::cout << "~A" << std::endl; }
 int i;
};

struct Test
{
 void test(A m) const { m.test(); }
};

void test(A m) { m.test(); }

int main() 
{
  Test t;
  {
    A m;
    std::bind(&Test::test, &t, m)();
  }
  {
    A m;
    [=](){t.test(m);}();
  }
  {
    A m;
    std::bind(&test, m)();
  }
  {
    A m;
    [=](){test(m);}();
  }
  return 0;
}

# gcc 4.6.2
test
~A
~A
~A
~A
~A
test
~A
~A
~A
test
~A
~A
~A
test
~A
~A
~A

# gcc 4.5.1
~A
test
~A
~A
~A
~A
~A
~A
test
~A
~A
~A
~A
test
~A
~A
~A
~A
test
~A
~A
~A